set up for deployment

backend/internal/models/version.go

@@ -0,0 +1,44 @@
+package models
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// DocumentVersion represents a snapshot of a document at a point in time
+type DocumentVersion struct {
+	ID              uuid.UUID  `json:"id"`
+	DocumentID      uuid.UUID  `json:"document_id"`
+	YjsSnapshot     []byte     `json:"-"`                    // Omit from JSON (binary)
+	TextPreview     *string    `json:"text_preview"`         // Full plain text
+	VersionNumber   int        `json:"version_number"`
+	CreatedBy       *uuid.UUID `json:"created_by"`
+	VersionLabel    *string    `json:"version_label"`
+	IsAutoGenerated bool       `json:"is_auto_generated"`
+	CreatedAt       time.Time  `json:"created_at"`
+}
+
+// DocumentVersionWithAuthor includes author information
+type DocumentVersionWithAuthor struct {
+	DocumentVersion
+	Author *User `json:"author,omitempty"` // Nullable if user deleted
+}
+
+// CreateVersionRequest is the API request for manual snapshots
+type CreateVersionRequest struct {
+	VersionLabel *string `json:"version_label"` // Optional user label
+	TextPreview  *string `json:"text_preview"`  // Frontend-generated full text
+	// YjsSnapshot sent as multipart file, not JSON
+}
+
+// RestoreVersionRequest specifies which version to restore
+type RestoreVersionRequest struct {
+	VersionID uuid.UUID `json:"version_id" binding:"required"`
+}
+
+// VersionListResponse for listing versions
+type VersionListResponse struct {
+	Versions []DocumentVersionWithAuthor `json:"versions"`
+	Total    int                         `json:"total"`
+}